Roll tables



Oct. 10, 1967 United States Patent F 3,345,850 ROLL TABLES Ernst TheodorSack, Hosel, and Ernst Becker, Dusseldorf- Rath, Germany, assignors toMaschinenfabrik Sack G.m.b.H., Dusseldorf-Rath, Germany Filed July 9,1965, Ser. No. 470,715 3 Claims. (Cl. 72-251) In roll tables such as areused, for instance, on both sides of the roll stands of rolling mills,casings holding the bearings for the rolls of the roll table are mountedon a supporting frame, which extends along the length of the table. Thecasings are rigidly connected to the frame by at least four bolts percasing. In another known kind of roll table, the rolls, with the bearingcasings mounted on the roll journals, are pushed into the frame as faras an abutment through lateral apertures in the form of round holes, inone side of the support frame, after which the bearing cases are screwedto the frame in the same way.

With this kind of connection between the bearing casings and the frameof a roll table, considerable labour and time is required to assemblethe table and to replace unserviceable rolls; it is particularlydifficult to replace the rolls of the roll tables of rolling mills inoperation, since the mill must be stopped and time is lost indismantling the old bearing casings and fitting the new ones.

It is an object of the invention to shorten the time necessary forremoving and replacing the bearing casings of such roll tables and thusto enable rolls to be replaced more quickly and also to enable the tableto be assembled more quickly initially.

To this end, according to this invention, in a roll table comprising asupporting frame and a number of casings holding hearings in which therolls rotate, each bearing casing has a pair of parallel lugs which areperpendicular to the bearing axis and which straddle the top edge of alongitudinally extending wall forming part of the frame, the lugs havingapertures which register with an aperture in the wall and the lugs beingclamped tightly to the wall by wedges which are tightened against oneanother and extend through the apertures in the lugs and through theaperture in the wall. If the apertures in the lugs are slightly offsettowards the bearing casings from the apertures in the wall, the Wedgeswhich are clamped against one another force the bearing casing againstthe top edge of the wall to provide a connection which is strong and notreadily movable in any direction.

A roll table constructed in accordance with the invention can have itsbearing casings secured to the frame with little labour and it can bedone very rapidly; to this end, the casings are placed from above withthe lugs straddling the longitudinal walls of the frame and a pair ofwedges are pushed through the registering apertures and are then jammedtogether.

An example of a roll table in accordance with the invention isillustrated diagrammatically in the accompanying drawings in which:

FIGURE 1 is a cross-section through the roll table, the bearing casingsbeing sectioned axially and the supporting frame being sectionedtransversely; and

Patented Oct. 10, 1967 ice FIGURE 2 is a side view of part of the rolltable with some of the rolls removed.

Casings 3 holding roller bearings 2, 2' for journals 1a of rolls 1 eachhave two lugs 4 which are parallel with one another and perpendicular tothe roll axis and are formed with apertures 4a, which are aligned witheach other. The casings 3 are supported on sidewalls 5 of a supportingframe and the lugs 4 straddle the top edges of the side- Walls 5. At theplace where each roll 1 is supported, the sidewalls 5 are formed withapertures 6 which are further away from the top edge of the sidewalls 5than are apertures 4a in the lugs 4 but in other respects register withthese apertures. Wedges 7 and 3 are pushed through the apertures 6 and4a and are tightened against one another by means of a screwthreaded pin9 fixed to each wedge 7. Each pin 9 extends through a bore in astirrup-like extension 10* of the other wedge, and nuts 11 force thewedges 7 and -8 together to draw the bearing casing 3 tightly againstthe top edge of the wall 5. To facilitate fitting and reduce time lostby aligning the rolls to a desired spacing and by bringing the aperturesin the lugs 4 into alignment with the apertures in the sidewalls 5, thesidewalls are formed with recesses 5a in their top edges.

These recesses locate the bearing casings 3.

The connection provided by longitudinally tightened wedges between thebearing casings and the frame is very reliable, but some other form ofconnection using eccentric pins which form rotating wedges andscrewthreaded pins may be used instead.

We claim:

1. A roll table comprising a supporting frame and a number of casingsholding bearings in which the rolls rotate, wherein each bearing casinghas a pair of parallel lugs which are perpendicular to the bearing axisand which straddle the top edge of a longitudinally extending wallforming part of the frame, the lugs having apertures which register withan aperture in the wall and the lugs being clamped tightly to the wallby wedges which are tightened against one another and extend through theapertures in the lugs and through the aperture in the wall.

2. A roll table according to claim 1, in which the apertures in the lugsare offset towards the bearing casing from the aperture in the part ofthe wall between the lugs.

3. A roll table according to claim 2, in which a pair of folding wedgesclamps each pair of lugs to the wall and one wedge has fixed to it ascrewthreaded pin which projects from its thinner end face, extendsthrough a bore in a stirrup-like extension at the thicker end of theother wedge and is tightened against the extension by nuts.

References Cited UNITED STATES PATENTS 2,391,272 12/1945 Rose 193- 352,696,288 12/ 1954 Barry 1 93-3 5 3,252,556 5/ 1966 Isacsson 19335CHARLES W. LANHAM, Primary Examiner.

H. D. HOINKES, Assistant Examiner.

1. A ROLL TABLE COMPRISING A SUPPORTING FRAME AND A NUMBER OF CASINGSHOLDING BEARING IN WHICH THE ROLLS ROTATE, WHEREIN EACH BEARING CASINGHAS A PAIR OF PARALLEL LUGS WHICH ARE PERPENDICULAR TO THE BEARING AXISAND WHICH STRADDLE THE TOP EDGE OF A LONGITUDINALLY EXTENDING WALLFORMING PART OF THE FRAME, THE LUGS HAVING APERTURES WHICH REGISTERWITHIN AN APERTURE IN THE WALL AND THE LUGS BEING CLAMPED TIGHTLY TO THEWALL BY WEDGES WHICH ARE TIGHTENED AGAINST ONE ANOTHER AND EXTENDTHROUGH THE APERTURES IN THE LUGS AND THROUGH THE APERTURE IN THE WALL.